4x+5=2x-7
4х-2х=-7-5
2х=-12
х=-12:2
х=-6
2x-4=8-2x
2х+2х=8+4
4х=12
х=12:4
х=3
5x-7=13
5х=13+7
5х=20
х=20:5
х=4
3(x+2)=2(x+2)
3х+6=2х+4
3х-2х=4-6
х=-2
4x+6=2(x+3)
4х+6=2х+6
4х-2х=6-6
2х=0
х=0:2
х=2
4x+5=2x-7
4х-2х=-7-5
2х=-12
х=-12:2
х=-6
2x-4=8-2x
2х+2х=8+4
4х=12
х=12:4
х=3
5x-7=13
5х=13+7
5х=20
х=20:5
х=4
3(x+2)=2(x+2)
3х+6=2х+4
3х-2х=4-6
х=-2
4x+6=2(x+3)
4х+6=2х+6
4х-2х=6-6
2х=0
х=0:2
х=2